In George Orwell's Animal Farm, when do they decide to change the name to Animal Farm?

George Orwell's classic dystpian novel "Animal farm" is a wonderful allegory of revolution. While it ma be compared to the Russian Revolution in a few instances, that might be a too narrow mindset for a book that is richly detailed and easy to read.

In Chapter 2, after the pigs had secretly taught themselves to read from a "spelling book" for three months that was discarded by Mrs. Jones 's children, Napoleon ordered black and white paint to be found to change the name of the farm from "Manor Farm" to "Animal Farm."

Then Snowball (for it was Snowball who was best at writing) took a brush between the two knuckles of his trotter, painted out MANOR FARM from the top bar of the gate and in its place painted ANIMAL FARM. This was to be the name of the farm from now onwards. (Chapter 2)

In Chapter 10, the name of Animal Farm was ironically changed back to to Manor Farm by Napoleon:

He had only one criticism, he said, to make of Mr. Pilkington's excellent and neighbourly speech. Mr. Pilkington had referred throughout to "Animal Farm." He could not of course know-for he, Napoleon, was only now for the first time announcing it-that the name "Animal Farm" had been abolished. Henceforward the farm was to be known as "The Manor Farm"-which, he believed, was its correct and original name. (Chapter 10)